blocklock-js/dist/crypto/ibe-bn254.d.ts

A library for encrypting and decrypting data for the future

import { Fp, Fp12, Fp2 } from '@noble/curves/abstract/tower';
import { AffinePoint } from '@noble/curves/abstract/weierstrass';
import { CHash } from "@noble/curves/abstract/utils";
export type G1 = AffinePoint<Fp>;
export type G2 = AffinePoint<Fp2>;
export type GT = Fp12;
export interface Ciphertext {
    U: G2;
    V: Uint8Array;
    W: Uint8Array;
}
export type IbeOpts = {
    hash: CHash;
    k: number;
    expand_fn: 'xmd' | 'xof';
    dsts: DstOpts;
};
export type DstOpts = {
    H1_G1: Uint8Array;
    H2: Uint8Array;
    H3: Uint8Array;
    H4: Uint8Array;
};
export declare const DEFAULT_OPTS: IbeOpts;
export declare function get_identity_g1(identity: Uint8Array, opts?: IbeOpts): G1;
export declare function encrypt_towards_identity_g1(m: Uint8Array, identity: Uint8Array, pk_g2: G2, opts?: IbeOpts): Ciphertext;
export declare function decrypt_g1(ciphertext: Ciphertext, decryption_key_g1: G1, opts?: IbeOpts): Uint8Array;
/**
 * Decryption function for IBE based on https://www.iacr.org/archive/crypto2001/21390212.pdf Section 6 / https://eprint.iacr.org/2023/189.pdf, Algorithm 1
 * with the identity on G1, and the master public key on G2.
 */
export declare function decrypt_g1_with_preprocess(ciphertext: Ciphertext, preprocessed_decryption_key: Uint8Array, opts?: IbeOpts): Uint8Array;
/**
 * Preprocess a signature by computing the hash of the pairing, i.e.,
 * H_2(e(\pi_\rho, U)).
 * @param ciphertext ciphertext to preprocess the decryption key for
 * @param decryption_key_g1 decryption key on g1 for the ciphertext
 * @param opts IBE scheme options
 * @returns preprocessed decryption key
 */
export declare function preprocess_decryption_key_g1(ciphertext: Ciphertext, decryption_key_g1: G1, opts?: IbeOpts): Uint8Array;
/**
 * Serialize Ciphertext to ASN.1 structure
 * Ciphertext ::= SEQUENCE {
 *    u SEQUENCE {
 *        x SEQUENCE {
 *            c0 INTEGER,
 *            c1 INTEGER
 *        },
 *        y SEQUENCE {
 *            c0 INTEGER,
 *            c1 INTEGER
 *        }
 *    },
 *    v OCTET STRING,
 *    w OCTET STRING
 * }
 */
export declare function serializeCiphertext(ct: Ciphertext): Uint8Array;
export declare function deserializeCiphertext(ct: Uint8Array): Ciphertext;